Card-exhibiting device.



No. 876,278. PATENTBD JAN. 7, 190s.

, G. MAYERLE.

CARD EXHIBITING DEVICE.

APPLICATION FILED 1713.19, 1907.

2 SHEETS-SHEET 1.

' w n DA 112 No. 876,278. PATBNTED JAN. 7, 1908.

' G. MAYERLE. CARD EXHIBITING DEVICE.

. APPLICATION FILED FEB; 19, 1907.

' I 2 BHBETS-SHEET 2.

GEORGE MAYERLE, OF SAN FRANCISCO, CALIFORNIA.

CARD-EXHIBITIN G DEVICE Specification of Letters Patent.

Patented Jan. 7, 1908.

Application filed February 19. 1907. Serial No. 358.311.

To all whom it may concern:

Be it known that I, GEORGE MAYERLE, a

. citizen of the United States, residing in the city and county of San Francisco, and in the State of California, have invented new and useful Improvements in Card-Exhibiting Devices, of which the following is a specification.

My invention relates in general to that class of devices which are usually secured permanentlyto walls, for exhibiting cards for various purposes, and more particularly ophthalmic cards or charts, as they are usually called by Opticians for testing eyes.

I-Ieretofore, devices of this character have been made with a closed or stationary front, and the charts placed therein slide out and in through the bottom part of the device by means of cords which. operate and support .them in position. Such method however, have been found very undesirable by practitioners, especially those in optic science, as they cannot obtain therewith the proper degree of elevation while testing the eyes of patients of different ages and condi tions. Furthermore, with the present system a partial exposure of the charts can be obtained only in one direction, that is, from the bottom up.

The object of my invention is to overcome the above mentioned objections and to con struct a simple, neat and convenient device, wherewith the front part or cover and the charts placed therein can be operated in either direction, that is, up or down, and independently of each other, thus bringing the chart to the degree of elevation desired and exposing the same entirely or any portion thereof.

In the accompanying drawings which form a part 01 this specification, I have illustrated my invention as it appears in practice, in which Figure 1, represents a perspective view of my invention secured to the wall as it appears while operating both the cover and the chart. Fig. 2, is an enlarged perspective partial sectional view taken from dotted lines A, B, of Fig. 1, looking in the direction of the arrow.

Like letters of reference designate similar .parts throughout the several views of the drawings.

In the drawing 1, denotes the front face of the casing formed of sheet metal or other suitable material bent or curved to form the sides 1 and the projecting edge portions 1 provided with apertures 1 for the passage of suitable securing means whereby the casing may be attached in convenient position upon a wall or other location. The front face of the casing is open as at 2 and is provided with a suitable cover 3 mounted therein to close the aperture when desired. ithin the casing, beyond the cover, is an adjustable chart i, of any desired character.

The top and bottom of the casing are cut away to allow the cover 3, and chart 4, to slide out and in therefrom when desired. Both the cover 3, and chart 1, are provided with cords by which they are operated and supported in position. The cord 5, is secured to the middle upper edge of the chart while the cords 6, are secured to the upper side ends of the cover, so that in opera tion, the face of the chart will not be obsoured.

7 are two metallic strips soldered or other wise fastened permanently to the inner sides of the casing and bonded at such angle to form suitable grooves 8, within which the sides of the chart are mounted and operated freely, and also recesses 9, for the cords 6, and guiding edges 10, for the cover, as particularly shown in Fig. 2.

With the above described device if it be desired. to exhibit a certain portion of the chart, for instance the upper and its middle portion, the operator may raise partially the chart by means of cord 5, and lower the cover by means of cords (5, thus showing the particular portion of the chart wanted, as shown in Fig. 1, and vice versa, as far as any other portions of the chart are concerned.

\Vhat I claim is A device of the character described comprising a casing open at its top and bottom and angular strips secured to the inner sides of the casing forming in combination with the sides of the casing grooves, a card slidable in certain of said grooves and a cover in the remainder of the grooves.

In testimony thereof I have hereunto signed my name in the presence of two 'witnesses this 9th day of February, 1907.

GEORGE MAYERLE. In presence of- F. WV. LAWLER, A. L. I-IANsEN. 

